Paper cutting machine



(No Model.) 2 Sheets-Sheet 1.

A. MALM.

PAPER CUTTING MACHINE.

No. 451,333. Patented Apr. 28, 1891.

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(No Modell.) Y 2 Sheets-Sheet 2.'

A. MALM. PAPER CUTTING MACHINE.

N0.451,333. y PatentedApr.z8,1891.

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ALEXANDER MALM, OF NEV YORK, N. Y., ASSIGNOR TO T. XV. da C. B. SHERIDAN, OF SAME PLACE.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 451,333, dated April 28, 1891.

Application filed January 29, 1891. Serial No. 379,566. ('No model.)

This invention relates to certain improve-4 ments in paper-cutting machines of that class in which both the knife and t-he paper-clamp are situated above the work-table and connected in such a manner that the pressure of` the clamp upon the paper increases or diminishes with the resistance which is to be overcome by the knife.

The peculiar and novel construction of my paper-cutter is pointed out in the following specification and claims and illustrated in the accompanying drawings, in Which- Figure l represents a side elevation, partly in section,in the plane indicated by the line oc, Fig. 2, and looking in the direction of the arrow opposite to that line. Fig. 2 is a front elevation. Fig. 3 is a longitudinal vertical section in the plane y y, Fig. 2. Fig. 4s -is a horizontal section in the plane a' a', Fig. l. Fig. 5. is a partial horizontal section in the plane 0c 0c,Fig. 2, showing those parts which are connected to the drivingshaft. Fig. 6 is a partial vertical section in the plane y y', Fig. 2. Fig. ,7 is a partial front View showing the parts in a different position from that shown in Fig. 2.

In the drawings, the letterA designates the frame, which supports the working parts of my machine.

, B is the work-table.

C is the knife, and D is the paper-olamp. The knife O is firmly secured to a cross-head E, from which extends a stud into an oblique slot, Fig. 2, whereby a shear cut is imparted to the knife.

In the frame A are lnounted two sleeves F F Fig. 4, through which extends the drivingshaft G, and on said sleeves, outside of the frame A, are loosely mounted the slot-ted segments H H', each of which is provided with teeth a a', respectively, said teethbeingformed on the outer edges of the slots, as seen in Figs. .l and 2.

Each of said slotted segmentsisprovided with a short arm b b', respectively,

and in these arms are secured studs c c', which connect by rods d d with the crosshead E, so that when said segments are permitted to drop down to the position shown in Figs. 1, 2, and 3 the cross-head E occupies its highest position, and if the segments are turned in the direction of arrows l, Figs. l and 3, the cross-head E is caused to move down and the knife cuts through the material placed upon the table B. On the sleeves F F', inside of the frame A, are also loosely mounted two segments l l', which are provided with cogs e e on their outer edges, and which connect by rods ff with a cross-bar J, which connects by slides g g with the paperclamp D. In the position shown in Figs. l, 2, and the clamp and the knife are at the upper end of their stroke; but if the segments l l are turned inthe direction of arrow 2, Figs. l and 3, the clamp is caused to move down so that it bears upon the mate rial to be cut.

K is the traveling shaft, which, when the knife and the clamp are at the upper end of theirzstroke, rests in half-boxes 7L 7L', formed at the ends of arms it', (best seen in Fig. 4,) which are iirmly attached to the frame A. On this traveling shaft are firmly mounted two pinionsjj, Figs. l, 3, and 4, of which the pinion j is in gear with the segments H and I, while the pinion j is in gear with the segments H l. lf the traveling shaft is turned in the direction of arrow 3, Figs. l and 3, the segments l I are caused to move down in the direction of arrow 2, and the segments H H are caused to move up in the direction of arrow l, and consequently both the clamp and theknife are made to descend. As soon as the clamp strikes the paper-or other material to be cut its downward movement is stopped, and by the action of the pinions j j upon the segments l l the traveling shaft K is caused to climb up until the knife begins to cnt, and then the pressure of the clamp upon the paper is increased in proportion to the resistance met by the knife in cutting. After the knife has reached the lower end of its stroke the motion of the traveling shaft is reversed automatically and the knife and the clamp are IOO moved upward, and when they have reached the upper end of their stroke the motion. of the traveling shaft is stopped automatically without interrupting the movement of the driving-shaft. These movements are accomplished by the following means: On the driving-shaft G is loosely mounted a pinion 7a, which can be thrown in gear with said shaft by a clutch-sleeve L, and which gears into a cog-wheel l, firmly mounted on the traveling shaft K. The driving-shaft is turned in the direction of arrow l, Fig. l, and if the pinion 7:, is thrown in gear with said driving-shaft the traveling shaft turns in the direction of arrow 3, Figs. 1 and 3, and the knife and clamp are caused to move down. On the driving-shaft G is also loosely mounted a pinion m, which is geared together with the traveling shaft K by a pinion n and cog-wheel p, Figs. land 4f, and the pinion in can be thrown in gear with the driving-shaft by means of the clutchsleeve L, and if this is done the traveling shaft is caused to turn in the direction opposite to arrow 3, and the knife and clamp are moved up. The proper relation between the driving-shaft and the traveling shaft is preserved by links M M. (See Fig. 4.) The clutch-sleeve L is connected to a hand-lever N, Fig. 5, so that it can be moved in gear either with the pinion la or with the pinion m., or so that it can be thrown out of gear with both those pinions. It the clutch-sleeve is thrown in gear with the pinion t, the clamp and the knife move down, and when the knife has reached the lower end of its stroke a toe q, which projects from the edge of the segment II', (see Fig. 1,) strikes a bell-crank lever Ir, which connects by a rod s with the clutch-lever P, and by these means the clutchsleeve Lis automaticallythrown in gear with the pinion on and the movement of the travcling shaft is reversed. This position of the clutch-sleeve and clutch-lever is shown in Fig. 7. As the clamp is moved upward a toe t, which projects from the slide J, strikes a pin a, secured in the clutch-lever P, and when the clamp and the knife have reached the top end ot' their stroke the clutch-lever is thrown into its central position, (see Fie. 2,) in which it is arrested by a stop yr, and the clutch-lever is thrown out of gear with both the pinions n and w1, so that the movement of the traveling shaft ceases. The hub of the pinion 7,: is

embraced by a strap Q, (best seen in Fig. 0,) and when the slide J reaches the upper end of its stroke a pin w strikes a bell-crank lever R, which connects with the strap Q by a rod S, and said strap is compressed, so that the pinion k cannot be moved by its frictional Contact with the driving-shaft.

)Vhat I claim as new, and desire to secure by Letters Patent, is

l. In a paper-cutter, the combination, with the cross-head E, the knife C, and the clamp D, ot' the driving-shaft G, the segmental gears II H', swi n gin g loosely round the drivin g-shait and connected tothe cross-head E, the segmental gears I I', swinging loosely round the driving-shaft and connected t0 the clamp D, the traveling shaft K, geared with both sets of segments Ii II and I I, and a clutch mechanism for imparting motion in reverse directions to the traveling shaft, substantially as described.

In a paper-cutter, the combination, with the cross-head E, the knife C, the clam p D, and the clamp-slide J, of the driving-shaft G and suitable connections for transmitting motion from said driving-shaft to the cross-head E and to the clamp D, comprising the traveling shaft K, geared. with the driving-shaft, a clutch and mechanism for imparting motion in rcvcrse directions to the traveling shaft, and a toe t, connected to the clamp-slide, for throwing the clutch-sleeve in its inactive position, substantially as described.

8. In a paper-cutter, the combination, with the cross-head E, the knife C, the clamp D, and the clamp-slide J, of the driving-shaft G, suitable connections for transmitting motion from said driving-shaft to the cross-head E and the clamp D, comprising the traveling shaft K, geared with the driving-shaft, the clutch-sleeve L, and pinions 7.: m for imparting motion in reverse directions to the travcling shaft, the strap Q, which embraces the hub of the pinion t, the bell-crank lever R, pin il, and rod S, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ALEXANDER MALM.

Witnesses:

J. VAN SANTvoonD, E. F. KAs'rENI-IUBER.

IOO 

